Colton Deck

By: Colton Deck on November 25th, 2022

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How Much Does a Takagi Tankless Water Heater Cost?

Tankless Water Heaters

If you’ve been shopping around for a good price on a Takagi tankless water heater, you’ve likely only seen disorganized Amazon information with little context. While Amazon offers convenience, it’s also not quite the best place to go all-in on a tankless water heater due to the scattered nature of the prices. Don’t worry, we’ve got you covered on how much Takagi tankless water heaters really cost. 

We’ve installed scores of tankless water heaters in homes across the Los Angeles area for over 15 years. One of the three main brands we carry is Takagi, so we’ve got your back when it comes to pricing out these Takagi tankless water heaters. 

By the end of this article, you’ll understand the price range of Takagi tankless water heaters and the factors that can increase your investment during installation. You’ll be able to tell what’s a fair price and avoid surprises during installation to build a realistic idea of what to expect when buying a tankless water heater. 


How Much Does a Takagi Tankless Water Heater Cost?

There’s no real way to price every model of Takagi water heater. Instead, we can give you a tight range of what to expect when purchasing a new tankless water heater from Takagi. A residential Takagi tankless water heater will run you between $800-$1800.

Where your tankless water heater falls within this price range depends on several factors. You’ll need to address your home size, demand, and the number of bathrooms to find the right fit for your family. It sounds a bit daunting, but you got this! Just follow these 3 steps to get an idea of what size tankless water heater is right for you

After running through those steps, you’ll have a clearer picture of what a Takagi tankless water heater will cost you. But your investment isn’t just informed by the price of the tankless water heater itself. Several factors play into the total cost of a tankless water heater from Takagi. 


Factors that Impact Cost

While a tankless water heater from Takagi seems like a no-brainer, thanks to the affordable price tag, your final expenses will be greater than just the cost of the unit. After all, what good is a tankless water heater if it isn’t properly installed? 

Check out the factors that can add up when installing a new tankless water heater so you can temper expectations heading into the installation process. 

Factors that impact cost are: 

  • Installation
  • Venting
  • Water lines
  • Gas lines



Installation is a necessary blow to your budget. There’s no getting around it, and it’s always best not to cut corners during a major home upgrade since safety is a concern. While there may be unforeseen expenses during installation, it’s best to get the job done right the first time. 

While the top-end Takagi model may max out at just $1,800, installation costs can raise the cost to between $4,700 and $8,000. It’s a pretty broad range, but there’s a reason for that wide gap. Some installers offer base and premium installation

With a base installation, you’ll likely get the usual water connections, gas connections, new isolation valves, and the unit itself included in the installation cost. Companies that offer premium installation typically include an expansion tank, a neutralizer, and water treatment for your tankless water heater to run at its best.

Depending on which route you take, you can expect to land near the top or bottom of the range. But a base installation can reach up to $6,200, while a premium installation might start at $5,000.

Aside from the initial installation costs, there are a few other considerations to factor in before making your move on a Takagi tankless water heater. 



Proper venting is a must when installing a tankless water heater, but your existing venting might not cut it. This is where you can see additional costs in the way of new or revamped venting. 

If your venting needs menial work, you can expect an added investment of about $395. But the more venting needed, the higher the cost. If your home requires more venting work, then it tracks that the cost would go up accordingly. 

There are a couple of other factors to keep in mind before scheduling an installation. Your water heater’s location also plays into budgeting for venting costs. In some cases, specific types of venting might be required to get the job done right, which will also affect cost. 

You may not incur the same costs as the next home, but calculating in some extra padding to your budget is always a wise move so that these types of adjustments don’t hit quite as hard when they arise. 


Water Lines

A technician may have to replace your water lines if they’re not in great shape. This is done to ensure your tankless water heater is installed safely and in a way that will help it last. You’ll definitely need new lines put in if you plan on relocating your water heater, though. 

Fixing up lines or installing new ones will run you between $395 to $995. While the low end of this project isn’t so bad, it can quickly turn into something a bit more involved, leaving you at the higher end of the scale when it comes to additional costs. It’s wise to budget on the higher end just to play it safe. 


Gas Lines

Your gas lines are often out of sight and out of mind, making their condition a bit of a mystery heading into the installation process. You may not even know what size your lines are, which can add more to your installation cost.

While many homes have ½-inch gas lines, tankless water heaters require ¾-inch gas lines. If you end up with ½-inch connections, then they’ll likely need to be swapped out, leading to a bump in your bill. 

There’s always the chance that your gas lines do fit, but their condition is also of consideration. If your gas lines aren’t in good working order, they’ll have to be replaced. 

Swapping out gas lines is a more expensive endeavor and can cost up to around $3,900. This repair is tough to budget for since most homeowners will be crossing their fingers that their lines are in order. Still, budgeting for this additional expense will help you avoid surprises during the installation.


Ready to Install a Takagi Tankless Water Heater?

We’ve talked about how much a Takagi tankless water heater costs and the pitfalls that can add to the final bill. With this information, you’ve got a better idea of what to expect beyond just the cost of the tankless water heater itself. Now, you understand the costs associated with your Takagi tankless water heater and can avoid surprises down the line. You’ll also have a better gauge if a Takagi tankless water heater is right for you. 

With over 15 years of tankless water heater experience under our belt, we can confidently say that Takagi is one of the more affordable brands on the market without cutting corners. There are plenty of other solid brands out there, but a Takagi presents an interesting value for more budget-conscious homeowners. Even though Takagi presents a solid value, the factors that can add to the final bill are worth considering ahead of installation time. 

It doesn’t matter if we sit here all day and praise a brand for its value or build quality unless you feel comfortable in your decision. Considering whether a tankless water heater is right for you is your next best step in making that decision. Takagi isn’t the only brand around, either. Comparing brands like Noritz vs. Rheem will give you a better idea of what’s on the market and worth your time and dollar. 

Our Ultimate Guide to Tankless Water Heaters can also get you up to speed on all things tankless water heaters and help point you in the right direction. 

If you’re ready to take the next step, give us a call at (310) 853- 8690 or visit us online at our tankless water heaters page to book a consultation.